/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.state;



import com.bff.gaia.unified.sdk.annotations.Experimental;

import com.bff.gaia.unified.sdk.annotations.Internal;



/**

 * {@link TimeDomain} specifies whether an operation is based on timestamps of elements or current

 * "real-world" time as reported while processing.

 */

@Experimental(Experimental.Kind.TIMERS)

public enum TimeDomain {

  /**

   * The {@link #EVENT_TIME} domain corresponds to the timestamps on the elements. Time advances on

   * the system watermark advances.

   */

  EVENT_TIME,



  /**

   * The {@link #PROCESSING_TIME} domain corresponds to the current (system) time. This is advanced

   * during execution of the pipeline.

   */

  PROCESSING_TIME,



  /**

   * <b>For internal use only; no backwards compatibility guarantees.</b>

   *

   * <p>Same as the {@link #PROCESSING_TIME} domain, except it won't fire a timer set for time

   * <i>t</i> until all timers from earlier stages set for a time earlier than <i>t</i> have fired.

   */

  @Internal

  SYNCHRONIZED_PROCESSING_TIME

}